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Frequently Asked Questions

What is flash exposure compensation (FEC)?

Digital Imaging - dslreports.com
Flash compensation is simply the adjustment of the intensity of the flash burst. Flash compensation is used when your flash is putting out too little or too much light. Many sub-dSLR cameras do not offer this option. Say you are shooting a group of people in black suits. Your flash fires and it turns out that your photograph is too dark. You didn't get enough light coming from the flash.
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What is the purpose of Exposure Compensation?

EVOLT E-510 > Frequently Asked Questions
Metering systems in cameras measure light but do not have a way of determining what the subject matter is, so the exposure decisions the metering system makes may not always be appropriate for the subject matter. This phenomenon is called subject failure. As with Spot metering, the human touch may be required to arrive at correct exposures. Exposure Compensation allows the photographer to set up the camera to under- or overexpose in specific situations.
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Why is exposure with my Canon flash system so unpredictable?

Digital Photography FAQ
Recent Canon SLRs use a system called E-TTL to determine flash exposure. (Newer models use E-TTL II, which seems to be more robust.) E-TTL is praised by some for allowing very precise control over flash exposure when used properly, but it is slammed by others for being too sensitive to very small changes in the center of the image and requiring too much planning to get proper "automatic" exposure. There is probably some truth in both positions.
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Is the A-TTL program affected by flash exposure compensation?

Canon EOS FAQ 2.4 - Flash
In fiddling with my 430EZ, it seems as though it doesn't figure the exposure compensation into the selected aperture. If you say you want flash overexposure by 3 stops, it gives the same aperture as selecting flash underexposure by 3 stops. Note that in a TTL (or A-TTL) flash system auto flash exposure is changed by changing the flash duration at a fixed apertures. Thus you would not expect an aperture change.
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Why do I get such long exposure times when using the flash in aperture priority mode?

Digital Photography FAQ
With many cameras, the camera assumes that you are using fill flash in aperture priority mode. Thus, it picks the correct exposure for the available light and fires the flash merely to fill in shadow areas. On some cameras, you may have workarounds for this: In manual mode, some cameras (e.g. Canon SLRs) will increase flash power to provide light needed for proper exposure, up to the limits of the power of your flash.
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How can exposure be controlled with a studio flash system?

Konica Minolta FAx (Forum & Ax FAQ)
The Ax can synch to the flash at any speed; however, if you set the shutter speed faster than about 1/800s, the exposure will be reduced because the camera is not capturing all of the flash duration. This can be used to advantage to allow you to open the aperture up wider than would otherwise be possible, but avoid overexposure by using a very high shutter speed. The open aperture provides a short depth of field which is often desirable in portrait work.
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What is compensation?

FAQ Frequently Asked Questions
Compensation is Veterans Affairs monthly cash benefits payable to veterans for problems related to the time of life they were in active service. They are also available if you were injured in a Veterans Affairs hospital. If Veterans Affairs considers you are disabled by a condition that is service connected, it will then determine the percentage to which you are disabled and then base your monthly payments on the extent to which you are currently disabled.
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When do I need to use flash compensation?

Konica Minolta FAx (Forum & Ax FAQ)
Essentially, flash compensation is needed whenever the flash output is too little or too much in any given mode and probably comes down more to personal taste and trial and error than to anything else. Some people like the greater and sometimes more even lighting control that can be obtained from using flash as the main source of light.
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Pentax Digital SLR Cameras :: DSLR :: *ist DL FAQ
Yes, you may change the flash output in a range of -2.0EV ~ +1.0EV by setting the [Flash Exp. Comp] in the [Rec.Mode] menu when using built-in Flash or External flash. The PENTAX DA, D FA, FA J, FA and F lens compatibility with the built-in Flash., the built-in flash fully discharges when used the lens that have no aperture A position., also vignetting may occur depending on the lens being used and the capture condition. We recommend taking a test shot to confirm this.
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WHAT IS A FLASH-BACK?

Ritual abuse FAQ
A flashback is a dissociated memory that returns to consciousness. It can be a smell, a taste, a sound, a picture, an emotion, or all these things together. It can last a moment, or linger on for weeks. People describe smelling alcohol or perfume when none is present, hearing a phrase over and over again in their heads, feeling panic or dread for no logical reason, or seeing pictures, like snapshots or movies behind their eyes. All these are fragmented memories rising up into consciousness.
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FAQ - Cosmic Wimpout - Frequently Asked Questions and Their ...
A Flash, also known as Triplets, is three of a kind on the same roll. That's right. A Flash must be rolled on the same throw of the dice. Three of a kind with several rolls during the same turn does not a Flash make.
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What is FEC?

The Freenet Project - faq
FEC stands for Forward Error Correction. When large files are inserted into Freenet, they are split into several small blocks -- this is called a splitfile. FEC adds redundant check blocks to a splitfile, so that if some of the blocks fall out of the network or can't be found, you might still be able to retrieve enough of the file to reconstruct it.
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What's the best way to use exposure compensation?

Video Production FAQ
Exposure compensation improves the recording of high contrast shots such as a person standing in front of a bright sky. If your camcorder has just a "backlight" button, simply push it to enable exposure compensation. If the amount of compensation can be adjusted, choose the best setting by varying the amount as you check the effect in the viewfinder.
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What is Auto Exposure Compensation? What’s its use in photography?

Photography, outsource image processing, photo scanning, pho...
Exposure Compensation is a feature generally found on an auto exposure camera. If a photographer wants to either under expose or over expose the picture deliberately he can't do so by simply changing the aperture or shutter speed on an auto exposure camera. If you stop down the aperture the camera automatically goes to a slower shutter speed keeping the exposure at the same level and vice versa. Exposure compensation will now come to your help.
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Why doesn't Canon use distance information for flash exposure calculations?

Canon EOS FAQ 2.4 - Flash
Distance info is only useful so that the camera can apply the "guide number" formula: f-stop = GN/distance. This is only a rough approximation. Off-The-Film (OTF) metering measures the true exposure of the film, which is much more accurate than the guide number calculations. In A-TTL, Canon uses a preflash to actively judge the effective flash-to-subject distance rather than passively.
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How Can Exposure Occur?

CDC Radiation Emergencies | Frequently Asked Questions (FAQs...
People are exposed to small amounts of radiation every day, both from naturally occurring sources (such as elements in the soil or cosmic rays from the sun), and man-made sources. Man-made sources include some electronic equipment (such as microwave ovens and television sets), medical sources (such as x-rays, certain diagnostic tests, and treatments), and from nuclear weapons testing.
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How does exposure compensation in EV compare to f-stops?

Digital Imaging - dslreports.com
The EV system relates to the old ASA number, as well as to the more current ISO system. A change of 1 in an EV number is one-third of a stop- or, for instance, the difference between ISO 100 and ISO 80 or 125. If you use continuous file numbering on your camera, where the file numbering is NOT reset every time you clear your memory card, it can be annoying when the file numbering is reset for some unknown reason. Some cameras don't provide an option to manually set the counter again.
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Why are we doing fEC?

Bristol University - Full Economic Cost - Frequently asked q...
fEC is a crucial part of the University's sustainability agenda, and will allow future investment in its infrastructure. Also, to be able to access Research Council funding we have to apply for research funding on a fEC basis.
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How is fEC calculated?

Faq- Full Economic Costing - University of Strathclyde
Under fEC, the full economic cost of a research project will be calculated. The full economic cost includes Directly Incurred costs, Directly Allocated Costs (including Estates Charges) and Indirect Costs as detailed below : Directly Incurred Costs Costs arising as a direct result of the specific piece of research. Directly incurred costs include new Research Assistants, travel and subsistence, consumables and equipment.
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What is Workers' Compensation?

FAQ: Workers' Compensation Philadelphia Work Injury Lawyer P...
Workers' Compensation is insurance paid for by employers to cover on-the-job injuries. State law requires employer to have such insurance or make other arrangements to pay for on-the-job injuries. Workers' suffering from work related injuries or diseases are entitled to wage-loss and medical expense benefits arising as a result of the injury or disease.
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To:
Under the workers' compensation law, if an employee sustains an occupational injury, workers' compensation laws may provide the employee with medical treatment and vocational rehabilitation; compensate the employee for job-related temporary and permanent disability; and protect the employee from retaliation for exercising workers' compensation rights.
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Is there any compensation for participating?

National Data Bank for Rheumatic Diseases - Frequently Asked...
Those of you who return your questionnaire within two weeks of receiving it are eligible for a special reward.We give away $1,000 prizes to several participants who return their questionnaires promptly as a token of our gratitude for helping with this research.The participants who receive a $1,000 prize are chosen at random in a special drawing and, with permission, their names are announced in our newsletter. We send an NDB Newsletter to each participant.
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SEO Software Affiliate Program Frequently Asked Affiliate Qu...
SEO Studio pays compensation on software products sold according to the compensation schedule and the affiliate license agreement . The standard affiliate commission rate is 50% per qualified sales before any sales or value added taxes up to a maximum of US$100.00.
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How can I get more exposure at the show?

Messe Frankfurt USA
Once you have secured a booth space, consider some of the many opportunities to put your products, your brand and your sales staff in front of decision makers. Including; New Product Showcase – Eligible products will have been introduced to market in the months between ISH North America 2004 and 2006. Attendees consider seeing new products one of their top priorities for attending the show. Be sure to drive traffic to your booth with an entry in the Showcase.
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How do I reduce flash?

Eastern Alloys, Inc.
Die and slide surfaces must be clean and free of anything that keeps them from closing. The adage "flash makes flash" is very true. Once a die starts to flash, the damage caused to the tool faces is costly to repair. The machine lock must be sufficient to withstand the die opening force generated when the metal is injected, therefore the lock-end hydraulic pressure must be sufficient and the die height correctly adjusted so that the toggles lock over hard.
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What is a slave flash?

Digital Photography FAQ
A slave flash is a flash that is triggered by another master flash. You may have noticed event photographers with assistants carrying flashes on poles. These are slave flashes which are triggered by a primary flash on the photographer's camera. The typical reason for using a slave flash is to illuminate your subject more evenly by providing flash light from multiple sources. There are several approaches to triggering a slave flash.
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